JPH11333713A - Back side pad for wafer polishing device - Google Patents
Back side pad for wafer polishing deviceInfo
- Publication number
- JPH11333713A JPH11333713A JP14904498A JP14904498A JPH11333713A JP H11333713 A JPH11333713 A JP H11333713A JP 14904498 A JP14904498 A JP 14904498A JP 14904498 A JP14904498 A JP 14904498A JP H11333713 A JPH11333713 A JP H11333713A
- Authority
- JP
- Japan
- Prior art keywords
- wafer
- back pad
- foam
- pad
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 32
- 239000006260 foam Substances 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 8
- 238000005192 partition Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000003486 chemical etching Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/304—Mechanical treatment, e.g. grinding, polishing, cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/27—Work carriers
- B24B37/30—Work carriers for single side lapping of plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/061—Work supports, e.g. adjustable steadies axially supporting turning workpieces, e.g. magnetically, pneumatically
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30625—With simultaneous mechanical treatment, e.g. mechanico-chemical polishing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＣＭＰ（化学的機
械研磨法）によるウェハ研磨装置用裏面パッドに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back pad for a wafer polishing apparatus by CMP (chemical mechanical polishing).
【０００２】[0002]
【従来の技術】近年、半導体装置の製造工程において、
フォトリソグラフィー工程の精度を高める等の目的で、
半導体ウェハの表面を平坦化する平坦化処理が行われて
おり、この平坦化処理としてはＳＯＧ（スピンオングラ
ス）法が典型的であるが、半導体装置の微細化の進展に
ともなってより平坦化が要求されている。このような要
求に応えるため、近年においては、化学的エッチング液
を含んだ研磨布を用いたＣＭＰ法が注目されており、ダ
マシン法を含めて平坦化のための主力技術となりつつあ
る。2. Description of the Related Art In recent years, in the manufacturing process of semiconductor devices,
For the purpose of improving the accuracy of the photolithography process,
2. Description of the Related Art A planarization process for planarizing the surface of a semiconductor wafer is performed. As this planarization process, a SOG (spin-on-glass) method is typical. Has been requested. In order to meet such demands, in recent years, a CMP method using a polishing cloth containing a chemical etching solution has attracted attention, and is becoming a main technology for flattening including a damascene method.
【０００３】図３（ａ）は従来のＣＭＰ法を用いた研磨
方法を説明するための概略の構成を示す断面図、（ｂ）
は裏面パッド部の底面図である。以下、同図に基づいて
これを説明する。全体を符号１で示すウェハ用研磨装置
は、平面視大円形の研磨テーブル２と、平面視小円形の
キャリアヘッド３と、スラリー５を滴下するスラリー供
給管４とから概ね構成されている。研磨テーブル２の下
面中央にはスピンドル６が下方に突設されるように固定
され、上面には、軟質の下層パッド７とこの下層パッド
７上に積層された硬質の上層パッド８が固着されてい
る。FIG. 3A is a cross-sectional view showing a schematic structure for explaining a polishing method using a conventional CMP method, and FIG.
FIG. 4 is a bottom view of the back pad portion. Hereinafter, this will be described with reference to FIG. The wafer polishing apparatus generally designated by reference numeral 1 generally includes a polishing table 2 having a large circular shape in plan view, a carrier head 3 having a small circular shape in plan view, and a slurry supply pipe 4 into which the slurry 5 is dropped. A spindle 6 is fixed at the center of the lower surface of the polishing table 2 so as to project downward, and a soft lower pad 7 and a hard upper pad 8 laminated on the lower pad 7 are fixed to the upper surface. I have.
【０００４】キャリアヘッド３は、円環状のリテーナリ
ング１０と、このリテーナリング１０の上部に埋設され
るように固着されたステンレス製のベースプレート１１
と、このベースプレート１１の上部中央に立設するよう
に固定されたスピンドル１２とによって構成されてい
る。ベースプレート１１の下面には、裏面パッド１５が
固着され、これらベースプレート１１と裏面パッド１５
内には、６本のエア管１３が平面視において円状に配置
されるようにして埋設され、このエア管１３には、ベー
スプレート１１の上部側に設けられた図示を省略したエ
ア供給源から圧縮エアが供給されるように構成されてい
る。[0004] The carrier head 3 includes an annular retainer ring 10 and a stainless steel base plate 11 fixed to be embedded in an upper portion of the retainer ring 10.
And a spindle 12 fixed to the upper center of the base plate 11 so as to be erected. A back pad 15 is fixed to the lower surface of the base plate 11.
Inside, six air pipes 13 are buried so as to be arranged in a circular shape in a plan view. The air pipes 13 are provided from an air supply source (not shown) provided on the upper side of the base plate 11. It is configured to supply compressed air.
【０００５】このような構成において、キャリアヘッド
３を下降させ、ウェハ１６を裏面パッド１５の底部によ
って上層パッド８に押し付けた状態とし、図示を省略し
たエア供給源からエア管１３にエアを供給し、裏面パッ
ド１５とウェハ１６との間に空気層を形成する。この状
態としてから、キャリアヘッド３を矢印方向に回転させ
るとともに、研磨テーブル２を反対方向に回転させ、ス
ラリー供給管４からスラリー５を滴下しながら、ウェハ
の下面１６を上層パッド８によって研磨する。In such a configuration, the carrier head 3 is lowered, the wafer 16 is pressed against the upper pad 8 by the bottom of the back pad 15, and air is supplied from an air supply source (not shown) to the air pipe 13. Then, an air layer is formed between the back pad 15 and the wafer 16. From this state, the lower surface 16 of the wafer is polished by the upper pad 8 while the carrier head 3 is rotated in the direction of the arrow and the polishing table 2 is rotated in the opposite direction, and the slurry 5 is dropped from the slurry supply pipe 4.
【０００６】[0006]
【発明が解決しようとする課題】図４（ａ）は従来の連
続気泡をもつ発泡体によって形成したウェハ研磨用裏面
パッドを用いたヘッドを断面したものであって、エア圧
の状態を説明するための模式図、（ｂ）は直径が８イン
チのウェハを使用し、ウェハの直径を測定ポイントとし
てウェハの研削量を図表化したものである。図５（ａ）
は従来の独立気泡をもつ発泡体によって形成したウェハ
研磨用裏面パッドを用いたヘッドを断面したものであっ
て、エア圧の状態を説明するための模式図、（ｂ）は直
径が８インチのウェハを使用し、ウェハの直径を測定ポ
イントとしたウェハの研削量を図表化したものである。FIG. 4 (a) is a cross-sectional view of a conventional head using a back pad for polishing a wafer formed of a foam having open cells, and illustrates the state of air pressure. FIG. 2B is a schematic diagram for using a wafer having a diameter of 8 inches and charting the grinding amount of the wafer using the diameter of the wafer as a measurement point. FIG. 5 (a)
FIG. 1 is a cross-sectional view of a head using a conventional back pad for wafer polishing formed of a foam having closed cells, and is a schematic diagram for explaining a state of air pressure. FIG. FIG. 4 is a graph showing the amount of grinding of a wafer using the wafer and measuring the diameter of the wafer as a measurement point.
【０００７】上述した従来の裏面パッド１５において
は、裏面パッド１５を連続気泡をもつ発泡体のみで形成
した場合には、図４（ｂ）に示すように、全体的に略均
一に研削はされるが、研削量は少なく、空気圧を増加さ
せても研削量の低下を改善することができない。また、
ウェハ１６の外周縁部付近の研削量の落ち込みが大き
く、特に、ウェハ１６の外径が８インチを越えると顕著
になることがわかった。これは、連続気泡をもつ発泡体
が横方向への空気の伝達がよいといった特有の性質によ
り、裏面パッド１５とウェハ１６との間に空気層１７が
均一に形成され、このためにウェハ１６を平坦状に研磨
しやすい。しかし、空気層１７が裏面パッド１５の全面
に行き渡ることにより、裏面パッド１５のウェハ１６へ
の押し付けが空気層１７に依存し、このために裏面パッ
ド１５の影響を受けにくくなり、研削量が少なくなるも
のと考えられる。また、ウェハ１６の外周縁部の研削量
の落ち込みが大きくなるのは、図４（ａ）に示すよう
に、空気層１７が裏面パッド１５の外周部から外側に逃
げやすいために、本来研削したいウェハ１６の外周縁部
へ加圧することができないといった理由によるものと考
えられる。In the conventional back pad 15 described above, when the back pad 15 is formed only of a foam having open cells, as shown in FIG. However, the grinding amount is small, and even if the air pressure is increased, the decrease in the grinding amount cannot be improved. Also,
It has been found that the amount of grinding in the vicinity of the outer peripheral edge of the wafer 16 is largely reduced, particularly when the outer diameter of the wafer 16 exceeds 8 inches. This is because the air layer 17 is uniformly formed between the back pad 15 and the wafer 16 due to the unique property that the foam having open cells has a good transfer of air in the lateral direction. Easy to polish flat. However, since the air layer 17 spreads over the entire surface of the back pad 15, the pressing of the back pad 15 against the wafer 16 depends on the air layer 17, so that the back pad 15 is hardly affected by the back pad 15 and the grinding amount is small. It is considered to be. 4A, the decrease in the amount of grinding at the outer peripheral edge of the wafer 16 is large because the air layer 17 easily escapes to the outside from the outer peripheral portion of the back pad 15, as shown in FIG. This is probably because the outer peripheral edge of the wafer 16 cannot be pressurized.
【０００８】一方、裏面パッド１５を独立気泡をもつ発
泡体のみで形成した場合には、図５（ｂ）に示すよう
に、ウェハ１６の中心Ｃから離間した測定ポイント
（２，８）の二箇所における研削量が他の測定ポイント
に比べて大きく、全体として研削量のばらつきがみら
れ。しかし、圧縮エアのエア圧を増加させることにより
全体の研削量の改善がみられる。これは、独立気泡をも
つ発泡体が、横方向への空気の伝達量は低くなるが、部
分的に圧力を加えることが可能であるといった特有の性
質により、同図（ａ）に示すように、裏面パッド１５と
ウェハ１６との間で空気層１７が形成される部分と空気
層１７が形成されない部分とが発生する。したがって、
ウェハ１６の全面が空気層１７によって均一に押圧され
ず、このためにウェハ１６の表面を平坦状に研磨するこ
とができないと考えられる。On the other hand, when the back pad 15 is formed only of a foam having closed cells, as shown in FIG. 5B, two measurement points (2, 8) separated from the center C of the wafer 16 are formed. The grinding amount at the location is larger than at other measurement points, and the grinding amount varies as a whole. However, increasing the air pressure of the compressed air can improve the overall grinding amount. This is because, as shown in FIG. 3A, the foam having closed cells has a unique property that the amount of air transmitted in the lateral direction is low, but partial pressure can be applied. Then, a portion where the air layer 17 is formed between the back pad 15 and the wafer 16 and a portion where the air layer 17 is not formed occur. Therefore,
It is considered that the entire surface of the wafer 16 is not pressed uniformly by the air layer 17, so that the surface of the wafer 16 cannot be polished flat.
【０００９】なお、図４（ｂ）および図５（ｂ）は、直
径が８インチのウェハ１６を使用し、ウェハ１６の中心
Ｃから径方向に１インチの間隔を隔てた位置を測定ポイ
ントとし、この測定ポイントにおけるウェハ１６の研削
量を図表化したものである。FIGS. 4 (b) and 5 (b) show a case in which a wafer 16 having a diameter of 8 inches is used, and a position spaced apart from the center C of the wafer 16 by 1 inch in the radial direction is set as a measurement point. Is a chart showing the amount of grinding of the wafer 16 at this measurement point.
【００１０】本発明は上記した従来の問題に鑑みなされ
たものであり、その目的とするところは、ウェハの研削
量を全面にわたって均一にし、かつ研削量の向上を図っ
たウェハ研磨装置用裏面パッドを提供することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a back pad for a wafer polishing apparatus in which the grinding amount of a wafer is made uniform over the entire surface and the grinding amount is improved. Is to provide.
【００１１】[0011]
【課題を解決するための手段】この目的を達成するため
に、本発明に係るウェハ研磨装置用裏面パッドは、研磨
パッドに表面が押し付けられたウェハの裏面を圧縮エア
を介して保持するウェハ研磨装置用裏面パッドであっ
て、外周部を独立気泡を有する発泡体によって形成し、
中央部を連続気泡を有する発泡体で形成したものであ
る。したがって、圧縮エアは中央部では連続気泡を有す
る発泡体によって裏面パッドとウェハの間を横方向に均
一に伝達し、外周部の独立気泡を有する発泡体によって
外部への漏出をできるかぎり規制する。In order to achieve this object, a back pad for a wafer polishing apparatus according to the present invention comprises a wafer polishing apparatus for holding, via compressed air, a back surface of a wafer whose surface is pressed against the polishing pad. A back pad for the device, the outer peripheral portion is formed by a foam having closed cells,
The central portion is formed of a foam having open cells. Therefore, the compressed air is uniformly transmitted in the lateral direction between the back pad and the wafer by the foam having open cells at the center, and the leakage to the outside is suppressed as much as possible by the foam having closed cells at the outer periphery.
【００１２】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図に
基づいて説明する。図１（ａ）は本発明に係るウェハ研
磨用裏面パッドを用いたヘッドを断面したものであっ
て、エア圧の状態を説明するための模式図、（ｂ）は同
じくウェハ研磨用裏面パッドの底面図である。同図にお
いて、上述した図３および図４で説明した従来技術と同
一または同等の構成については、同一の符号を付し詳細
な説明は適宜省略する。本発明の特徴とするところは、
裏面パッド１５の外周部をリング状の独立気泡を有する
発泡体１５２によって形成するとともに、この独立気泡
を有する発泡体１５２で囲まれた中央部を円柱状の連続
気泡を有する発泡体１５１によって形成した点にある。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a cross-sectional view of a head using a back pad for wafer polishing according to the present invention, and is a schematic diagram for explaining a state of air pressure. FIG. It is a bottom view. In the figure, the same reference numerals are given to the same or equivalent components as those of the conventional technology described with reference to FIGS. 3 and 4, and the detailed description is omitted as appropriate. The features of the present invention include:
The outer periphery of the back pad 15 was formed by a foam 152 having ring-shaped closed cells, and a central portion surrounded by the foam 152 having the closed cells was formed by a foam 151 having column-shaped open cells. On the point.
【００１３】このような構成とすることにより、エア管
１３から裏面パッド１５とウェハ１６との間に圧縮エア
が供給されると、圧縮エアは、上述したように、連続気
泡を有する発泡体１５１が横方向へ空気の伝達がよいと
いった特有の性質を有することにより、裏面パッド１５
とウェハ１６との間に均一な空気層１７が形成される。
したがって、ウェハ１６を全面にわたって平坦状に研磨
しやすくなる。また、裏面パッド１５の外周部に設けた
独立気泡を有する発泡体１５２によって、このウェハ１
６の外周縁部に所定の圧力を加えることができるので、
裏面パッド１５とウェハ１６との間に形成される空気層
１７が裏面パッド１５の外周部から漏出することが規制
される。したがって、従来裏面パッド１５を連続気泡を
有する発泡体によってのみ形成した場合に発生していた
ウェハ１６の外周縁部の研削量の落ち込みを防止し、ウ
ェハ１６を全体的に均一に研削することができる。With such a configuration, when compressed air is supplied between the back pad 15 and the wafer 16 from the air pipe 13, the compressed air is converted into the foam 151 having open cells as described above. Has a unique property that the air is well transmitted in the lateral direction.
A uniform air layer 17 is formed between the wafer and the wafer 16.
Therefore, the wafer 16 can be easily polished flatly over the entire surface. Further, the wafer 152 is provided by a foam 152 having closed cells provided on the outer peripheral portion of the back pad 15.
Since it is possible to apply a predetermined pressure to the outer peripheral edge of 6,
Leakage of the air layer 17 formed between the back pad 15 and the wafer 16 from the outer periphery of the back pad 15 is restricted. Therefore, it is possible to prevent a reduction in the amount of grinding of the outer peripheral portion of the wafer 16 which would otherwise occur when the back pad 15 is formed only of a foam having open cells, and to uniformly grind the wafer 16 as a whole. it can.
【００１４】図２は本発明の第２の実施の形態を示すの
もので、（ａ）はウェハ研磨用裏面パッドを用いたヘッ
ドを断面したものであって、エア圧の状態を説明するた
めの模式図、（ｂ）は同じくウェハ研磨用裏面パッドの
底面図である。この第２の実施の形態では、上述した第
１の実施の形態に加えて、中央部分の連続気泡を有する
発泡体１５１に断面がマトリックス状に配置した独立気
泡を有する発泡体によって形成した仕切り１５３を設
け、これら仕切り１５３に囲まれた部位にエア管１３を
設けたものである。2A and 2B show a second embodiment of the present invention. FIG. 2A is a cross-sectional view of a head using a back pad for polishing a wafer, and is for explaining the state of air pressure. FIG. 2B is a bottom view of the wafer polishing back pad. In the second embodiment, in addition to the above-described first embodiment, a partition 153 formed by a foam having closed cells and having a cross section arranged in a matrix in a foam 151 having open cells at a central portion. And the air tube 13 is provided in a region surrounded by the partition 153.
【００１５】このような構成とすることにより、仕切り
１５３によってウェハ１６の中央部分の連続気泡を有す
る発泡体１５１内の部分的な研削量の落ち込みを防止す
ることができる。すなわち、仕切り１５３によって部分
的にウェハ１６への圧力を増大させ、この部位における
研削量を増大させることができ、このため、ウェハ１６
の研削量を全体的に均一に増大させることが可能にな
る。With such a configuration, the partition 153 can prevent a partial decrease in the amount of grinding in the foam 151 having open cells in the central portion of the wafer 16. That is, the pressure on the wafer 16 can be partially increased by the partition 153, and the amount of grinding at this portion can be increased.
Can be uniformly increased as a whole.
【００１６】なお、この第２の実施の形態では、仕切り
１５２をマトリックス状に配置したが、このような形状
に限定されるものではなく、同心円状あるいはハニカム
状に形成してもよく、種々の設計変形が可能である。ま
た、エア管１３は、必ずしも仕切り１５２に囲まれた部
位すべてに設ける必要はない。In the second embodiment, the partitions 152 are arranged in a matrix. However, the partitions are not limited to such a shape, and may be formed in a concentric shape or a honeycomb shape. Design deformation is possible. In addition, the air pipe 13 does not necessarily need to be provided in all portions surrounded by the partition 152.
【００１７】[0017]
【実施例】連続気泡をもつ発泡体１５１および独立気泡
をもつ発泡体１５２を、圧縮率３０％のポリウレタンに
よって形成した。また、研削量を改善するために、独立
気泡を有する発泡体１５２を、圧縮率が１８〜５％のポ
リウレタンによって形成した。EXAMPLE A foam 151 with open cells and a foam 152 with closed cells were formed from polyurethane with a compressibility of 30%. Further, in order to improve the grinding amount, the foam 152 having closed cells was formed of polyurethane having a compression ratio of 18 to 5%.
【００１８】[0018]
【発明の効果】以上説明したように、請求項１記載の発
明によれば、ウェハの外周縁部の研削量の落ち込みを防
止し、ウェハを全体的に均一に研削することができる。As described above, according to the first aspect of the present invention, it is possible to prevent the amount of grinding at the outer peripheral edge of the wafer from dropping and to uniformly grind the wafer as a whole.
【００１９】また、請求項２ないし４記載の発明によれ
ば、ウェハの研削量を全体的に均一に増大させることが
できる。Further, according to the second to fourth aspects of the present invention, the amount of grinding of the wafer can be uniformly increased as a whole.
【図１】 （ａ）は本発明に係るウェハ研磨用裏面パッ
ドを用いたヘッドを断面したものであって、エア圧の状
態を説明するための模式図、（ｂ）は同じくウェハ研磨
用裏面パッドの底面図である。FIG. 1A is a cross-sectional view of a head using a back pad for wafer polishing according to the present invention, and is a schematic diagram for explaining a state of air pressure, and FIG. It is a bottom view of a pad.
【図２】 本発明の第２の実施の形態を示し、（ａ）は
本発明に係るウェハ研磨用裏面パッドを用いたヘッドを
断面したものであって、エア圧の状態を説明するための
模式図、（ｂ）は同じくウェハ研磨用裏面パッドの底面
図である。2A and 2B show a second embodiment of the present invention, and FIG. 2A is a cross-sectional view of a head using a back pad for wafer polishing according to the present invention, which is for explaining the state of air pressure. FIG. 2B is a schematic bottom view of the wafer polishing back pad.
【図３】 （ａ）は従来のＣＭＰ法を用いた研磨方法を
説明するための概略の構成を示す断面図、（ｂ）は裏面
パッド部の底面図である。FIG. 3A is a cross-sectional view showing a schematic configuration for explaining a polishing method using a conventional CMP method, and FIG. 3B is a bottom view of a back surface pad portion.
【図４】 （ａ）は従来の連続気泡をもつ発泡体によっ
て形成したウェハ研磨用裏面パッドを用いたヘッドを断
面したものであって、エア圧の状態を説明するための模
式図、（ｂ）は直径が８インチのウェハを使用し、ウェ
ハの直径を測定ポイントとしてウェハの研削量を図表化
したものである。FIG. 4A is a cross-sectional view of a head using a conventional back pad for wafer polishing formed of a foam having open cells, and is a schematic diagram for explaining the state of air pressure. 4) is a chart in which a wafer having a diameter of 8 inches is used and the grinding amount of the wafer is charted using the diameter of the wafer as a measurement point.
【図５】 （ａ）は従来の独立気泡をもつ発泡体によっ
て形成したウェハ研磨用裏面パッドを用いたヘッドを断
面したものであって、エア圧の状態を説明するための模
式図、（ｂ）は直径が８インチのウェハを使用し、ウェ
ハの直径を測定ポイントとしたウェハの研削量を図表化
したものである。FIG. 5A is a cross-sectional view of a conventional head using a back pad for wafer polishing formed of a foam having closed cells, and is a schematic diagram for explaining a state of air pressure, and FIG. ) Is a chart showing the amount of grinding of a wafer using a wafer having a diameter of 8 inches and using the diameter of the wafer as a measurement point.
１５…裏面パッド、１５１…連続気泡をもつ発泡体、１
５２…独立気泡をもつ発泡体、１５３…仕切り、１３…
エア管、１６…ウェハ、１７…空気層。15: back pad, 151: foam with open cells, 1
52: foam having closed cells, 153: partition, 13:
Air tube, 16: wafer, 17: air layer.
Claims (4)
ハの裏面を圧縮エアを介して保持するウェハ研磨装置用
裏面パッドであって、外周部を独立気泡をもつ発泡体に
よって形成し、中央部を連続気泡をもつ発泡体で形成し
たことを特徴とするウェハ研磨装置用裏面パッド。1. A back pad for a wafer polishing apparatus for holding, via compressed air, a back surface of a wafer whose front surface is pressed against a polishing pad, wherein an outer peripheral portion is formed of a foam having closed cells, and a central portion is formed. A back pad for a wafer polishing apparatus, wherein the back pad is formed of a foam having open cells.
ッドにおいて、中央部をマトリックス状に配置した独立
気泡をもつ発泡体によって仕切ったことを特徴とするウ
ェハ研磨装置用裏面パッド。2. The back pad for a wafer polishing apparatus according to claim 1, wherein a center portion of the back pad is separated by a foam having closed cells arranged in a matrix.
ッドにおいて、中央部を同心円状に配置した独立気泡を
もつ発泡体によって仕切ったことを特徴とするウェハ研
磨装置用裏面パッド。3. The back pad for a wafer polishing apparatus according to claim 1, wherein a center portion is partitioned by a foam having closed cells arranged concentrically.
ッドにおいて、中央部をハニカム状に配置した独立気泡
をもつ発泡体によって仕切ったことを特徴とするウェハ
研磨装置用裏面パッド。4. The back pad for a wafer polishing apparatus according to claim 1, wherein a center portion of the back pad is separated by a foam having closed cells arranged in a honeycomb shape.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14904498A JP2907209B1 (en) | 1998-05-29 | 1998-05-29 | Back pad for wafer polishing equipment |
| EP99110054A EP0960694A1 (en) | 1998-05-29 | 1999-05-21 | Wafer polishing apparatus and backing pad for wafer polishing |
| TW088108793A TW426579B (en) | 1998-05-29 | 1999-05-26 | Wafer polishing apparatus and backing pad for wafer polishing |
| KR1019990019498A KR100310879B1 (en) | 1998-05-29 | 1999-05-28 | Wafer polishing apparatus and backing pad for wafer polishing |
| CN99107890A CN1237783A (en) | 1998-05-29 | 1999-05-28 | Wafer polishing equipment and pads for wafer polishing |
| US09/323,121 US6139409A (en) | 1998-05-29 | 1999-06-01 | Wafer polishing apparatus and backing pad for wafer polishing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14904498A JP2907209B1 (en) | 1998-05-29 | 1998-05-29 | Back pad for wafer polishing equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2907209B1 JP2907209B1 (en) | 1999-06-21 |
| JPH11333713A true JPH11333713A (en) | 1999-12-07 |
Family
ID=15466432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14904498A Expired - Lifetime JP2907209B1 (en) | 1998-05-29 | 1998-05-29 | Back pad for wafer polishing equipment |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6139409A (en) |
| EP (1) | EP0960694A1 (en) |
| JP (1) | JP2907209B1 (en) |
| KR (1) | KR100310879B1 (en) |
| CN (1) | CN1237783A (en) |
| TW (1) | TW426579B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4236292B2 (en) * | 1997-03-06 | 2009-03-11 | 日本碍子株式会社 | Wafer adsorption apparatus and method for manufacturing the same |
| JP3502550B2 (en) * | 1998-10-07 | 2004-03-02 | 株式会社東芝 | Polishing equipment |
| DE10196317T1 (en) * | 2000-06-08 | 2003-11-13 | Speedfam Ipec Corp Chandler | Orbital polisher |
| WO2001096066A1 (en) * | 2000-06-15 | 2001-12-20 | Infineon Technologies North America Corp. | Wafer polishing method |
| US6537141B1 (en) * | 2001-01-30 | 2003-03-25 | Koninklijke Philips Electronics N.V. | Non-slip polisher head backing film |
| KR100497205B1 (en) * | 2001-08-02 | 2005-06-23 | 에스케이씨 주식회사 | Chemical mechanical polishing pad with micro-holes |
| US6517426B2 (en) | 2001-04-05 | 2003-02-11 | Lam Research Corporation | Composite polishing pad for chemical-mechanical polishing |
| US7121919B2 (en) * | 2001-08-30 | 2006-10-17 | Micron Technology, Inc. | Chemical mechanical polishing system and process |
| US6752703B2 (en) * | 2001-12-21 | 2004-06-22 | Lam Research Corporation | Chemical mechanical polishing apparatus and methods with porous vacuum chuck and perforated carrier film |
| US20060211349A1 (en) * | 2005-03-18 | 2006-09-21 | Seh America, Inc. | Wafer polishing template for polishing semiconductor wafers in a wax free polishing process |
| JP4680314B1 (en) * | 2010-02-04 | 2011-05-11 | 東邦エンジニアリング株式会社 | Auxiliary plate for polishing pad and method for regenerating polishing pad using the same |
| US8939815B2 (en) * | 2011-02-21 | 2015-01-27 | Taiwan Semiconductor Manufacturing Company, Ltd. | Systems providing an air zone for a chucking stage |
| KR102559647B1 (en) * | 2016-08-12 | 2023-07-25 | 삼성디스플레이 주식회사 | Substrate polishing system and substrate polishing method |
| CN107498462A (en) * | 2017-07-31 | 2017-12-22 | 安庆市晶科电子有限公司 | A kind of crystal production tool of flexible position-limit mechanism |
| CN108381330B (en) * | 2018-03-16 | 2019-09-06 | 中国工程物理研究院激光聚变研究中心 | A kind of burnishing device and polissoir |
| CN116000784B (en) * | 2022-12-29 | 2024-08-16 | 西安奕斯伟材料科技股份有限公司 | Bearing piece of silicon wafer double-sided polishing device and silicon wafer double-sided polishing device |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4521995A (en) * | 1980-05-23 | 1985-06-11 | Disco Co., Ltd. | Wafer attracting and fixing device |
| JPS60146675A (en) * | 1984-01-05 | 1985-08-02 | Canon Inc | Chuck |
| US4927432A (en) * | 1986-03-25 | 1990-05-22 | Rodel, Inc. | Pad material for grinding, lapping and polishing |
| JPS63251166A (en) * | 1987-04-07 | 1988-10-18 | Hitachi Ltd | Wafer chuck |
| US5267418A (en) * | 1992-05-27 | 1993-12-07 | International Business Machines Corporation | Confined water fixture for holding wafers undergoing chemical-mechanical polishing |
| DE69316849T2 (en) * | 1992-11-27 | 1998-09-10 | Ebara Corp., Tokio/Tokyo | Method and device for polishing a workpiece |
| TW353203B (en) * | 1995-04-10 | 1999-02-21 | Matsushita Electric Ind Co Ltd | Apparatus for holding substrate to be polished |
| JP3129172B2 (en) * | 1995-11-14 | 2001-01-29 | 日本電気株式会社 | Polishing apparatus and polishing method |
| JP3072962B2 (en) * | 1995-11-30 | 2000-08-07 | ロデール・ニッタ株式会社 | Workpiece holder for polishing and method of manufacturing the same |
| US5762539A (en) * | 1996-02-27 | 1998-06-09 | Ebara Corporation | Apparatus for and method for polishing workpiece |
| JP3348272B2 (en) * | 1996-03-27 | 2002-11-20 | 富士通株式会社 | Wafer polishing method |
| JPH10193260A (en) * | 1996-12-27 | 1998-07-28 | Shin Etsu Handotai Co Ltd | Wafer holding jig |
-
1998
- 1998-05-29 JP JP14904498A patent/JP2907209B1/en not_active Expired - Lifetime
-
1999
- 1999-05-21 EP EP99110054A patent/EP0960694A1/en not_active Withdrawn
- 1999-05-26 TW TW088108793A patent/TW426579B/en not_active IP Right Cessation
- 1999-05-28 CN CN99107890A patent/CN1237783A/en active Pending
- 1999-05-28 KR KR1019990019498A patent/KR100310879B1/en not_active IP Right Cessation
- 1999-06-01 US US09/323,121 patent/US6139409A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2907209B1 (en) | 1999-06-21 |
| US6139409A (en) | 2000-10-31 |
| KR19990088658A (en) | 1999-12-27 |
| TW426579B (en) | 2001-03-21 |
| EP0960694A1 (en) | 1999-12-01 |
| CN1237783A (en) | 1999-12-08 |
| KR100310879B1 (en) | 2001-10-17 |
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